Top 100 Contractors in NAICS 5419: Other Professional, Scientific, and Technical Services, FY2025

Name: Top 100 Contractors in NAICS 5419: Other Professional, Scientific, and Technical Services, FY2025
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Oct 1, 2024 – Sep 30, 2025 Code page on GovTribe

The top 10 won 42% of FY2025 NAICS 5419 contract dollars

Contract obligations: $13,231,176,899 Net of deobligations, by contracts coded NAICS 5419 or a code under it
Contractors: 3,542 Parent companies with an obligation
Largest contractor: Battelle Memorial Institute $1.94 billion, 13.8% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	Battelle Memorial Institute 2 awardees, including Battelle Energy Alliance, LLC Top agencies DOE (Department of Energy) DARPA (Defense Advanced Research Projects Agency) USAF (Department of the Air Force)	$1,943,776,839	13.8%	Rank history: #1 in FY2021, #1 in FY2022, not on the FY2023 list and #1 in FY2024; unchanged since FY2024.
2	The Mitre Corporation 3 awardees Top agencies USAF (Department of the Air Force) Commerce (Department of Commerce) VA (Department of Veterans Affairs)	$647,568,021	4.6%	Rank history: #3 in FY2021, #2 in FY2022, #2 in FY2023 and #3 in FY2024; up 1 since FY2024.
3	Booz Allen Hamilton Holding Corporation 2 awardees, including Booz Allen Hamilton Inc. Top agencies Army (Department of the Army) HHS (Department of Health and Human Services) OSD (Office of the Secretary of Defense)	$640,362,032	4.6%	Rank history: #11 in FY2021, #9 in FY2022, #7 in FY2023 and #8 in FY2024; up 5 since FY2024.
4	Sierra Nevada Company, LLC 2 awardees Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense) Navy (Department of the Navy)	$632,340,411	4.5%	Rank history: #2 in FY2021, #3 in FY2022, #3 in FY2023 and #4 in FY2024; unchanged since FY2024.
5	Smartronix, LLC Top agencies Navy (Department of the Navy)	$631,297,368	4.5%	Rank history: not on the FY2021–FY2024 lists; up 130 since FY2024.
6	Huntington Ingalls Industries, Inc. 2 awardees, including HII Mission Technologies Corp and Fulcrum It Services, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force)	$487,699,385	3.5%	Rank history: not on the FY2021–FY2022 lists, #17 in FY2023 and #10 in FY2024; up 4 since FY2024.
7	Northrop Grumman Corporation 6 awardees, including Northrop Grumman Systems Corporation Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$336,643,584	2.4%	Rank history: #17 in FY2021, #10 in FY2022, #14 in FY2023 and #13 in FY2024; up 6 since FY2024.
8	Institute for Defense Analyses Top agencies OSD (Office of the Secretary of Defense) Army (Department of the Army) Navy (Department of the Navy)	$237,483,871	1.7%	Rank history: #12 in FY2021, #8 in FY2022, #8 in FY2023 and #9 in FY2024; up 1 since FY2024.
9	Oak Ridge Associated Universities, Incorporated Top agencies DOE (Department of Energy) HHS (Department of Health and Human Services)	$221,530,371	1.6%	Rank history: #5 in FY2021, #4 in FY2022, #5 in FY2023 and #6 in FY2024; down 3 since FY2024.
10	ABT Global LLC 2 awardees Top agencies USAID (US Agency for International Development) HHS (Department of Health and Human Services)	$188,056,315	1.3%	Rank history: #6 in FY2021, #6 in FY2022, #12 in FY2023 and #11 in FY2024; up 1 since FY2024.
11	Parsons Corporation 4 awardees, including Ptsi Managed Services Inc., Parsons Government Services International Inc. and Altamira Technologies Corp Top agencies DOT (Department of Transportation) DOE (Department of Energy) USAF (Department of the Air Force)	$180,292,782	1.3%	Rank history: #98 in FY2021, #73 in FY2022, #19 in FY2023 and #19 in FY2024; up 8 since FY2024.
12	Johns Hopkins University 3 awardees, including The Johns Hopkins University Applied Physics Laboratory LLC and The Johns Hopkins Hospital Top agencies OSD (Office of the Secretary of Defense) USSOCOM (United States Special Operations Command) USAF (Department of the Air Force)	$172,180,449	1.2%	Rank history: not on the FY2021–FY2024 lists; new.
13	DAI Global LLC Top agencies USAID (US Agency for International Development)	$164,452,728	1.2%	Rank history: #7 in FY2021, #5 in FY2022, #6 in FY2023 and #7 in FY2024; down 6 since FY2024.
14	Path Top agencies USAID (US Agency for International Development)	$157,716,684	1.1%	Rank history: not on the FY2021–FY2023 lists and #77 in FY2024; up 63 since FY2024.
15	Deloitte 3 awardees, including Deloitte Consulting LLP and Deloitte & Touche LLP Top agencies USAF (Department of the Air Force) USAID (US Agency for International Development) HHS (Department of Health and Human Services)	$141,660,837	1.0%	Rank history: not on the FY2021–FY2023 lists and #18 in FY2024; up 3 since FY2024.
16	General Dynamics Corporation 4 awardees, including General Dynamics Information Technology, Inc. and General Dynamics Mission Systems, Inc. Top agencies Army (Department of the Army) DTRA (Defense Threat Reduction Agency) USAF (Department of the Air Force)	$140,797,234	1.0%	Rank history: #64 in FY2021, #55 in FY2022, #57 in FY2023 and #27 in FY2024; up 11 since FY2024.
17	CACI International Inc. 3 awardees, including Caci, Inc. - Federal, Caci Nss, LLC and Caci Idt, LLC Top agencies Army (Department of the Army) USSOCOM (United States Special Operations Command) OSD (Office of the Secretary of Defense)	$136,693,476	1.0%	Rank history: #27 in FY2021, #35 in FY2022, #53 in FY2023 and #31 in FY2024; up 14 since FY2024.
18	Bluestaq LLC Top agencies USAF (Department of the Air Force)	$115,823,143	0.8%	Rank history: not on the FY2021 list, #46 in FY2022, #45 in FY2023 and #17 in FY2024; down 1 since FY2024.
19	Research Triangle Institute Top agencies HHS (Department of Health and Human Services) USAID (US Agency for International Development) NSF (National Science Foundation)	$111,708,069	0.8%	Rank history: #16 in FY2021, #15 in FY2022, #13 in FY2023 and #14 in FY2024; down 5 since FY2024.
20	RTX Corporation 10 awardees, including Raytheon Company and V2X Aerospace LLC Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$110,843,970	0.8%	Rank history: not on the FY2021–FY2023 lists and #5 in FY2024; down 15 since FY2024.
21	Strategic Analysis, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) HHS (Department of Health and Human Services) Navy (Department of the Navy)	$106,877,235	0.8%	Rank history: #80 in FY2021, #61 in FY2022, #50 in FY2023 and #33 in FY2024; up 12 since FY2024.
22	The CNA Corporation Top agencies Navy (Department of the Navy) WHS (DOD Washington Headquarters Service) OSD (Office of the Secretary of Defense)	$104,835,822	0.7%	Rank history: #19 in FY2021, #20 in FY2022, #22 in FY2023 and #24 in FY2024; up 2 since FY2024.
23	Qlarant Integrity Solutions LLC Top agencies HHS (Department of Health and Human Services)	$98,267,574	0.7%	Rank history: not on the FY2021–FY2023 lists and #60 in FY2024; up 37 since FY2024.
24	The Rand Corporation Top agencies OSD (Office of the Secretary of Defense) Army (Department of the Army)	$93,573,624	0.7%	Rank history: #18 in FY2021, #16 in FY2022, #16 in FY2023 and #21 in FY2024; down 3 since FY2024.
25	Asgn Incorporated Through ECS Federal, LLC Top agencies HHS (Department of Health and Human Services) DARPA (Defense Advanced Research Projects Agency) Commerce (Department of Commerce)	$92,055,211	0.7%	Rank history: not on the FY2021–FY2023 lists and #47 in FY2024; up 22 since FY2024.
26	Lockheed Martin Corporation 6 awardees Top agencies Army (Department of the Army) Navy (Department of the Navy) USAF (Department of the Air Force)	$85,850,063	0.6%	Rank history: #69 in FY2021, not on the FY2022 list, #26 in FY2023 and #29 in FY2024; up 3 since FY2024.
27	Sos International LLC Top agencies DOJ (Department of Justice) USAF (Department of the Air Force) DOS (Department of State)	$85,422,482	0.6%	Rank history: #24 in FY2021, #79 in FY2022, #20 in FY2023 and #61 in FY2024; up 34 since FY2024.
28	V2X, Inc. 2 awardees, including V2X Aerospace LLC and Vertex Modernization and Sustainment LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DTRA (Defense Threat Reduction Agency)	$83,839,021	0.6%	Rank history: not on the FY2021–FY2024 lists; new.
29	Valiant Global Defense Services Inc. Top agencies Army (Department of the Army) DTRA (Defense Threat Reduction Agency)	$80,668,777	0.6%	Rank history: not on the FY2021–FY2024 lists; up 95 since FY2024.
30	Chemonics International, Inc. Top agencies USAID (US Agency for International Development)	$78,924,946	0.6%	Rank history: #9 in FY2021, #7 in FY2022, #9 in FY2023 and #15 in FY2024; down 15 since FY2024.
31	BAE Systems 2 awardees, including BAE Systems Technology Solutions & Services Inc. and BAE Systems Information & Electronic Systems Integration Inc. Top agencies DHS (Department of Homeland Security) USAF (Department of the Air Force)	$73,531,267	0.5%	Rank history: not on the FY2021–FY2024 lists; up 119 since FY2024.
32	Accenture Federal Services LLC 2 awardees Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) OSD (Office of the Secretary of Defense)	$71,330,864	0.5%	Rank history: not on the FY2021–FY2023 lists and #25 in FY2024; down 7 since FY2024.
33	Peraton Inc. 2 awardees, including Safeguard Services LLC Top agencies HHS (Department of Health and Human Services) DTRA (Defense Threat Reduction Agency) Navy (Department of the Navy)	$64,818,796	0.5%	Rank history: not on the FY2021–FY2024 lists; up 402 since FY2024.
34	Cyber Engineering and Technical Alliance, LLC Top agencies USAF (Department of the Air Force) USAID (US Agency for International Development) DHS (Department of Homeland Security)	$63,882,376	0.5%	Rank history: not on the FY2021 list, #94 in FY2022, #54 in FY2023 and #41 in FY2024; up 7 since FY2024.
35	Amentum Holdings, Inc. 6 awardees, including Amentum Services, Inc., URS Federal Services International, Inc. and PAE Korea Limited Top agencies DTRA (Defense Threat Reduction Agency) Army (Department of the Army) DARPA (Defense Advanced Research Projects Agency)	$60,422,453	0.4%	Rank history: not on the FY2021–FY2024 lists; up 233 since FY2024.
36	Leidos Holdings, Inc. 6 awardees, including Leidos, Inc. Top agencies Army (Department of the Army) OSD (Office of the Secretary of Defense) DHA (Defense Health Agency)	$60,115,621	0.4%	Rank history: #20 in FY2021, #22 in FY2022, #23 in FY2023 and #26 in FY2024; down 10 since FY2024.
37	Schafer Government Services, LLC Top agencies DARPA (Defense Advanced Research Projects Agency)	$59,200,473	0.4%	Rank history: not on the FY2021–FY2024 lists; up 191 since FY2024.
38	Arctic Slope Regional Corporation 10 awardees, including Asrc Federal Technology Solutions, LLC, Agile Decision Sciences, LLC and Asrc Federal Business Innovation LLC Top agencies EPA (Environmental Protection Agency) Treasury (Department of the Treasury) USAF (Department of the Air Force)	$56,716,021	0.4%	Rank history: #90 in FY2021 and not on the FY2022–FY2024 lists; up 186 since FY2024.
39	National Opinion Research Center Top agencies HHS (Department of Health and Human Services) NSF (National Science Foundation)	$52,038,203	0.4%	Rank history: not on the FY2021–FY2022 lists, #44 in FY2023 and #32 in FY2024; down 7 since FY2024.
40	Systems Planning and Analysis, Inc. Top agencies DARPA (Defense Advanced Research Projects Agency) WHS (DOD Washington Headquarters Service) OSD (Office of the Secretary of Defense)	$50,798,012	0.4%	Rank history: #61 in FY2021, #69 in FY2022, #51 in FY2023 and #73 in FY2024; up 33 since FY2024.
41	Poplicus Incorporated Top agencies Navy (Department of the Navy) Army (Department of the Army) MDA (DOD Missile Defense Agency)	$48,100,000	0.3%	Rank history: #72 in FY2021, #67 in FY2022, #39 in FY2023 and #23 in FY2024; down 18 since FY2024.
42	UnitedHealth Group Incorporated 2 awardees, including Optumhealth Care Solutions, LLC Top agencies DHA (Defense Health Agency)	$48,013,553	0.3%	Rank history: #22 in FY2021, #21 in FY2022, not on the FY2023 list and #34 in FY2024; down 8 since FY2024.
43	Connected Alliances LLC Top agencies USAF (Department of the Air Force) OSD (Office of the Secretary of Defense)	$44,316,951	0.3%	Rank history: not on the FY2021 list, #66 in FY2022, #82 in FY2023 and #22 in FY2024; down 21 since FY2024.
44	Worldwide Language Resources, LLC Top agencies Army (Department of the Army) USSOCOM (United States Special Operations Command)	$42,749,369	0.3%	Rank history: #32 in FY2021, #72 in FY2022, not on the FY2023 list and #65 in FY2024; up 21 since FY2024.
45	Blue Cross and Blue Shield of South Carolina Through Karna LLC Top agencies HHS (Department of Health and Human Services)	$40,147,198	0.3%	Rank history: not on the FY2021–FY2022 lists, #90 in FY2023 and #87 in FY2024; up 42 since FY2024.
46	Noridian Healthcare Solutions, LLC Top agencies HHS (Department of Health and Human Services)	$39,679,248	0.3%	Rank history: not on the FY2021–FY2023 lists and #71 in FY2024; up 25 since FY2024.
47	Vets Synergetic Group LLC Top agencies HHS (Department of Health and Human Services)	$39,139,780	0.3%	Rank history: not on the FY2021–FY2024 lists; up 129 since FY2024.
48	Celeen LLC Top agencies OSD (Office of the Secretary of Defense) USAF (Department of the Air Force) DOD (Department of Defense)	$37,420,665	0.3%	Rank history: not on the FY2021–FY2023 lists and #44 in FY2024; down 4 since FY2024.
49	Coventbridge (USA) LLC Top agencies HHS (Department of Health and Human Services)	$37,342,124	0.3%	Rank history: not on the FY2021–FY2023 lists and #58 in FY2024; up 9 since FY2024.
50	Techtrans International Inc. Top agencies DTRA (Defense Threat Reduction Agency) NASA (National Aeronautics and Space Administration) DOS (Department of State)	$36,408,646	0.3%	Rank history: not on the FY2021–FY2024 lists; up 173 since FY2024.
51	PAL Technologies Inc Top agencies USAF (Department of the Air Force)	$35,569,400	0.3%	Rank history: not on the FY2021–FY2024 lists; new.
52	Palladium International LLC Top agencies USAID (US Agency for International Development)	$33,750,761	0.2%	Rank history: #23 in FY2021, #23 in FY2022, #24 in FY2023 and #46 in FY2024; down 6 since FY2024.
53	Scientific Research Corporation Top agencies OSD (Office of the Secretary of Defense) USAF (Department of the Air Force)	$33,516,238	0.2%	Rank history: not on the FY2021–FY2024 lists; up 77 since FY2024.
54	Metlang LLC Top agencies DOJ (Department of Justice)	$33,460,504	0.2%	Rank history: not on the FY2021–FY2022 lists, #80 in FY2023 and #63 in FY2024; up 9 since FY2024.
55	Planet Labs Federal, Inc. Top agencies NASA (National Aeronautics and Space Administration)	$33,454,204	0.2%	Rank history: not on the FY2021–FY2024 lists; new.
56	Analytic Services Inc. Top agencies OSD (Office of the Secretary of Defense)	$32,654,646	0.2%	Rank history: not on the FY2021–FY2023 lists and #83 in FY2024; up 27 since FY2024.
57	Riverside Research Institute Top agencies USAF (Department of the Air Force)	$32,224,500	0.2%	Rank history: not on the FY2021–FY2023 lists and #68 in FY2024; up 11 since FY2024.
58	Westat, Inc. 2 awardees Top agencies HHS (Department of Health and Human Services) NSF (National Science Foundation)	$31,033,750	0.2%	Rank history: #31 in FY2021, #26 in FY2022, #37 in FY2023 and #67 in FY2024; up 9 since FY2024.
59	The Boeing Company 6 awardees, including Boeing Aerospace Operations, Inc. and Jeppesen Foreflight, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) DOT (Department of Transportation)	$30,460,199	0.2%	Rank history: #50 in FY2021, #99 in FY2022, #56 in FY2023 and #57 in FY2024; down 2 since FY2024.
60	Dexis Interactive Incorporated Top agencies DSCA (Defense Security Cooperation Agency) USAID (US Agency for International Development)	$28,954,946	0.2%	Rank history: not on the FY2021–FY2022 lists, #83 in FY2023 and #59 in FY2024; down 1 since FY2024.
61	Tetra Tech, Inc. 7 awardees, including Ard, Inc., Advanced Management Technology, Inc. and Management Systems International, Inc. Top agencies USAID (US Agency for International Development) DOT (Department of Transportation) DSCA (Defense Security Cooperation Agency)	$27,521,095	0.2%	Rank history: #14 in FY2021, #19 in FY2022, #11 in FY2023 and #12 in FY2024; down 49 since FY2024.
62	Jhpiego Corp Top agencies USAID (US Agency for International Development)	$27,311,877	0.2%	Rank history: not on the FY2021 list, #50 in FY2022, #64 in FY2023 and not on the FY2024 list; up 47 since FY2024.
63	People, Technology and Processes, LLC Top agencies Navy (Department of the Navy) USSOCOM (United States Special Operations Command)	$27,011,940	0.2%	Rank history: not on the FY2021–FY2023 lists and #90 in FY2024; up 27 since FY2024.
64	Plateau Software, Inc. Top agencies Army (Department of the Army)	$26,717,496	0.2%	Rank history: not on the FY2021–FY2024 lists; up 44 since FY2024.
65	KLD Associates Inc. Top agencies DOT (Department of Transportation)	$26,183,492	0.2%	Rank history: not on the FY2021–FY2023 lists and #64 in FY2024; down 1 since FY2024.
66	Axle Informatics, LLC Top agencies HHS (Department of Health and Human Services)	$26,161,568	0.2%	Rank history: #74 in FY2021, #92 in FY2022, #72 in FY2023 and #35 in FY2024; down 31 since FY2024.
67	Novitas Solutions, Inc. Top agencies HHS (Department of Health and Human Services)	$25,927,147	0.2%	Rank history: not on the FY2021–FY2024 lists; up 223 since FY2024.
68	Linquest Corporation Top agencies USAF (Department of the Air Force)	$25,549,998	0.2%	Rank history: #87 in FY2021, #89 in FY2022, #70 in FY2023 and #82 in FY2024; up 14 since FY2024.
69	Pgls LLC Top agencies DOJ (Department of Justice) GSA (General Services Administration)	$24,858,374	0.2%	Rank history: #79 in FY2021, #59 in FY2022, #58 in FY2023 and #51 in FY2024; down 18 since FY2024.
70	Tetra TECH ES, Inc. Top agencies USAID (US Agency for International Development) MCC (Millennium Challenge Corporation)	$24,121,369	0.2%	Rank history: not on the FY2021–FY2023 lists and #50 in FY2024; down 20 since FY2024.
71	Health Care Service Corporation, A Mutual Legal Reserve Company Top agencies HHS (Department of Health and Human Services)	$24,000,000	0.2%	Rank history: not on the FY2021–FY2022 lists, #78 in FY2023 and not on the FY2024 list; up 227 since FY2024.
72	Eagle Integrated Services, LLC Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency)	$23,859,149	0.2%	Rank history: not on the FY2021 list, #78 in FY2022, #79 in FY2023 and #80 in FY2024; up 8 since FY2024.
73	Calibre Systems Inc. Top agencies Army (Department of the Army)	$23,818,263	0.2%	Rank history: #46 in FY2021, #71 in FY2022, #60 in FY2023 and #72 in FY2024; down 1 since FY2024.
74	National Marrow Donor Program Top agencies HHS (Department of Health and Human Services)	$23,765,119	0.2%	Rank history: not on the FY2021 list, #84 in FY2022, #89 in FY2023 and #88 in FY2024; up 14 since FY2024.
75	The Mission Essential Group, LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$23,665,366	0.2%	Rank history: not on the FY2021–FY2022 lists, #95 in FY2023 and #75 in FY2024; unchanged since FY2024.
76	Serco Inc Top agencies Navy (Department of the Navy) Commerce (Department of Commerce) Army (Department of the Army)	$23,558,146	0.2%	Rank history: not on the FY2021–FY2024 lists; up 58 since FY2024.
77	Forensic Technology (Canada) Inc. Top agencies DOJ (Department of Justice)	$23,317,990	0.2%	Rank history: not on the FY2021–FY2024 lists; up 71 since FY2024.
78	JS Technology, Inc. Top agencies HHS (Department of Health and Human Services)	$22,900,502	0.2%	Rank history: not on the FY2021–FY2024 lists; up 36 since FY2024.
79	DT Global LLC Top agencies USAID (US Agency for International Development) MCC (Millennium Challenge Corporation)	$22,194,701	0.2%	Rank history: not on the FY2021–FY2022 lists, #36 in FY2023 and #66 in FY2024; down 13 since FY2024.
80	American Type Culture Collection Top agencies HHS (Department of Health and Human Services)	$22,175,660	0.2%	Rank history: not on the FY2021–FY2024 lists; up 112 since FY2024.
81	Hendall Inc. Top agencies HHS (Department of Health and Human Services)	$21,742,310	0.2%	Rank history: #55 in FY2021, #51 in FY2022, #47 in FY2023 and #49 in FY2024; down 32 since FY2024.
82	Ocean Bay Information and Systems Management, LLC Top agencies DOJ (Department of Justice)	$21,189,797	0.2%	Rank history: not on the FY2021–FY2023 lists and #97 in FY2024; up 15 since FY2024.
83	Nightwing Technologies LLC Top agencies USAF (Department of the Air Force)	$21,022,746	0.1%	Rank history: not on the FY2021–FY2024 lists; up 58 since FY2024.
84	Applied Research Associates, Inc. Top agencies DTRA (Defense Threat Reduction Agency)	$20,875,418	0.1%	Rank history: #42 in FY2021 and not on the FY2022–FY2024 lists; up 31 since FY2024.
85	Priority One Services, Inc. Top agencies HHS (Department of Health and Human Services)	$20,746,896	0.1%	Rank history: #100 in FY2021 and not on the FY2022–FY2024 lists; up 18 since FY2024.
86	Nana Regional Corporation, Inc. 4 awardees, including Akima Global Logistics, LLC and Akima Data Management LLC Top agencies DOT (Department of Transportation) DSCA (Defense Security Cooperation Agency) OSD (Office of the Secretary of Defense)	$20,222,631	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
87	Charles River Laboratories International Inc. Through Charles River Laboratories, Inc. Top agencies HHS (Department of Health and Human Services) VA (Department of Veterans Affairs) Navy (Department of the Navy)	$20,142,640	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
88	Gap Solutions, Inc. Top agencies HHS (Department of Health and Human Services)	$19,888,784	0.1%	Rank history: not on the FY2021–FY2024 lists; up 52 since FY2024.
89	System High Corporation Top agencies Navy (Department of the Navy) USAF (Department of the Air Force)	$19,819,538	0.1%	Rank history: not on the FY2021–FY2024 lists; up 37 since FY2024.
90	Laulima Government Solutions, LLC Top agencies HHS (Department of Health and Human Services)	$19,806,709	0.1%	Rank history: #84 in FY2021, #98 in FY2022 and not on the FY2023–FY2024 lists; up 14 since FY2024.
91	SRC Inc. Top agencies USAF (Department of the Air Force)	$19,618,854	0.1%	Rank history: not on the FY2021–FY2024 lists; up 14 since FY2024.
92	JBW Group LLC Top agencies Army (Department of the Army)	$19,408,366	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
93	Advanced Concepts Enterprises, Inc. Top agencies USAF (Department of the Air Force)	$19,217,160	0.1%	Rank history: not on the FY2021–FY2024 lists; up 260 since FY2024.
94	Everfox LLC Top agencies USAF (Department of the Air Force)	$18,845,486	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
95	Vero Technical Support Inc Top agencies DOT (Department of Transportation)	$18,769,463	0.1%	Rank history: not on the FY2021–FY2024 lists; up 50 since FY2024.
96	Medical Access Uganda Limited Top agencies USAID (US Agency for International Development)	$18,698,852	0.1%	Rank history: not on the FY2021 list, #60 in FY2022, not on the FY2023 list and #39 in FY2024; down 57 since FY2024.
97	Palmetto Gba, LLC Top agencies HHS (Department of Health and Human Services)	$18,280,042	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
98	Calvert Systems Engineering, Inc. Top agencies USAF (Department of the Air Force)	$18,271,382	0.1%	Rank history: not on the FY2021–FY2024 lists; new.
99	Capital Center for Credibility Assessment Corporation Top agencies DHS (Department of Homeland Security)	$18,031,812	0.1%	Rank history: not on the FY2021–FY2024 lists; up 128 since FY2024.
100	G D Arab Limited Company Top agencies Army (Department of the Army)	$17,946,852	0.1%	Rank history: not on the FY2021 list, #90 in FY2022, not on the FY2023 list and #93 in FY2024; down 7 since FY2024.

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100 of 3,542 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 5419

Code	Net obligations	Largest contractor
54199 All Other Professional, Scientific, and Technical Services	$12,530,556,164	Battelle Memorial Institute
54193 Translation and Interpretation Services	$369,251,560	Sos International LLC
54191 Marketing Research and Public Opinion Polling	$190,632,768	National Opinion Research Center
54194 Veterinary Services	$137,210,592	JS Technology, Inc.
54192 Photographic Services	$3,525,815	Kreative Marketing Strategies, Inc.

How this ranking works

Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $14 billion obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
Fiscal year 2025 ran Oct 1, 2024 – Sep 30, 2025. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2024. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2024 takes the color of the rank change beside it.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 NAICS 5419 contractors in FY2025?

1. Battelle Memorial Institute ($1.94B), 2. The Mitre Corporation ($648M), 3. Booz Allen Hamilton Holding Corporation ($640M), 4. Sierra Nevada Company, LLC ($632M), 5. Smartronix, LLC ($631M), 6. Huntington Ingalls Industries, Inc. ($488M), 7. Northrop Grumman Corporation ($337M), 8. Institute for Defense Analyses ($237M), 9. Oak Ridge Associated Universities, Incorporated ($222M), 10. ABT Global LLC ($188M).

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